基于FLUENT的液壓破碎錘泄漏量計(jì)算

機(jī)械設(shè)計(jì)制造及其自動(dòng)化論文，論文編號(hào):JX1182  論文字?jǐn)?shù):19062.頁(yè)數(shù):41

摘    要
 液壓破碎錘是一種由液壓能轉(zhuǎn)化為機(jī)械沖擊能的破碎機(jī)具，以液體壓力驅(qū)動(dòng)活塞往復(fù)運(yùn)動(dòng)做功，對(duì)外輸出能量進(jìn)行工作。廣泛應(yīng)用于國(guó)防施工、公路和鐵路建設(shè)、市政工程等行業(yè)。本文主要研究液壓破碎錘中的迷宮密封流量場(chǎng)。
 研究的主要內(nèi)容是建立迷宮密封三維CFD數(shù)學(xué)模型，應(yīng)用當(dāng)前國(guó)內(nèi)流通的CFD軟件Fluent模擬分析以及計(jì)算液壓破碎錘迷宮密封流場(chǎng)以，計(jì)算不同情況下液體的泄漏量。分析出了迷宮密封幾何尺寸、齒尖形狀、轉(zhuǎn)速、偏心等因素對(duì)泄漏量的影響規(guī)律，對(duì)密封結(jié)構(gòu)進(jìn)行優(yōu)化，改善了迷宮密封的密封性能。
 第一章，首先介紹了液壓破碎錘的應(yīng)用和概況，及目前迷宮密封課題研究的意義和迷宮密封模擬及數(shù)值計(jì)算的研究現(xiàn)狀國(guó)內(nèi)外文獻(xiàn)綜述，及本課題所進(jìn)行工作和內(nèi)容。
 第二章，簡(jiǎn)要介紹了計(jì)算流體力學(xué)與fluent軟件，及其在仿真流體流動(dòng)情況方面的廣泛應(yīng)用。
 第三章，主要介紹本文研究所應(yīng)用的模型建立方法和過(guò)程。首先是介紹湍流模型和SIMPLE算法。然后以圖文對(duì)照的方式具體地描述了用gambit軟件從點(diǎn)線面體逐步建立研究對(duì)象模型的過(guò)程，以及計(jì)算過(guò)程中的邊界條件及其他條件的設(shè)置。
 第四章，對(duì)模型建立后獲得的結(jié)果進(jìn)行分析和比較。從截面速度、壓力等方面的分析出模型的優(yōu)劣。并通過(guò)對(duì)迷宮密封形狀、尺寸、轉(zhuǎn)速等因數(shù)對(duì)泄漏量的影響，對(duì)密封結(jié)構(gòu)進(jìn)行優(yōu)化，改善了迷宮密封的密封性能。
 第五章，對(duì)全文內(nèi)容進(jìn)行了總結(jié)概括和對(duì)研究本課題方法的展望。
關(guān)鍵詞：  破碎錘 迷宮密封 FLUENT 泄漏量     
Abstract

 Hydraulic breaking hammer is a hydraulic pressure to mechanical impact energy into the broken equipment to the liquid pressure acting reciprocating piston-driven, external work output energy. Widely used in national defense construction, road and railway construction, municipal engineering and other industries. In this paper, research hydraulic breaking hammer of the labyrinth seal flow field.    The main contents of the study is to establish three-dimensional labyrinth seal CFD mathematical model, the application of the domestic circulation of the current CFD software Fluent simulation analysis and calculation of hydraulic breaking hammer labyrinth seal to the flow field, under different volume of liquid leakage. Analysis of the geometry of the labyrinth seal teeth tip shape, speed, eccentricity and other factors on the effects of leakage, to optimize the structure of the seal, a labyrinth seal to improve sealing performance.    The first chapter introduces the application of hydraulic breaking hammer and profile and the current research labyrinth seal and labyrinth seal of the significance of numerical simulation and the research literature at home and abroad, and the subject of the work and content.     The second chapter briefly introduced and the fluent computational fluid dynamics software, and its application in the actual simulation of fluid flow of a wide range of applications     The third chapter introduces the Institute for the application of this article and the process of model building. First of all, is to introduce the turbulence model and the SIMPLE algorithm. Graphic control and then the way to describe the use of specific software gambit lines to cover the body from the point of the study model of the gradual establishment of the process, as well as the calculation of the boundary conditions and other conditions set.     Chapter IV, on the model results was analyzed and compared. From the cross-section rate, pressure and so the analysis of the merits and demerits of the model. Through the labyrinth seal of the shape, size, speed and other factors affect the amount of leakage, to optimize the structure of the seal, a labyrinth seal to improve sealing performance.     Chapter V of the full text of the speech summed up the content and methods to study the issues ahead.

Keywords：hydraulic breaking hammer；Labyrinth seal ；FLUENT； Leakage
 
目   錄
摘    要 i
Abstract ii
目   錄 iv
第一章  緒 論 1
1.1 液壓破碎錘的發(fā)展概況 1
1.2  迷宮密封簡(jiǎn)介 2
1.3 迷宮密封流場(chǎng)特性研究現(xiàn)狀 3
1.3.1 迷宮密封實(shí)驗(yàn)研究概況 4
1.3.2迷宮密封數(shù)值研究進(jìn)展 5
1.4  課題研究的內(nèi)容及意義 6
第二章 計(jì)算流體力學(xué)與FLUENT軟件介紹 7
2.1計(jì)算流體力學(xué)簡(jiǎn)介 7
2.2 FLUENT軟件簡(jiǎn)介 8
第三章  流量場(chǎng)計(jì)算模型 10
3.1  計(jì)算流體力學(xué)理論與方法 10
3.11  湍流模型簡(jiǎn)介 10
3.12   SIMPLE算法 11
3.2  模型建立及網(wǎng)格劃分 11
3.2.1  初步建模 12
3.2.2 網(wǎng)格劃分 18
3.2.3 計(jì)算 20
第四章  FLUENT仿真及分析 25
4.1  軸向截面速度和壓力分析 25
4.2  軸向截面速度分布 26
4.3  軸向截面溫度的分析 27
4.4  流體泄漏量的分析 28
第五章  總結(jié)與展望 33
致  謝 36